UCC2897 Series
110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection
Manufacturer: Texas Instruments
Catalog(7 parts)
| Part | Number of Outputs▲▼ | Duty Cycle (Max)▲▼ | Synchronous Rectifier▲▼ | Topology | Mounting Type | Function | Operating Temperature▲▼ | Operating Temperature▲▼ | Output Configuration | Package / Case▲▼ | Package / Case▲▼ | Package / Case | Control Features | Frequency - Switching▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Clock Sync▲▼ | Output Phases▲▼ | Supplier Device Package | Output Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments UCC2897PWRFlyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-TSSOP | 1 ul | 0.7400000095367432 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 105 °C | -40 °C | Isolation Capable, Positive | 0.004394200164824724 m | 0.004399999976158142 m | 20-TSSOP | Enable, On Time Control, Soft Start | 250000 Hz | 8.5 V | 14.5 V | 1 ul | 20-TSSOP | Transistor Driver | ||
Texas Instruments UCC2897ARGPTFlyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-QFN (4x4) | 1 ul | 0.699999988079071 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 125 °C | -40 °C | Isolation Capable, Positive | 20-VFQFN Exposed Pad | Current Limit, Enable, Soft Start | 250000 Hz | 8.5 V | 16 V | 1 ul | 20-QFN (4x4) | Transistor Driver | ||||
Texas Instruments UCC2897PWRG4Flyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-TSSOP | 1 ul | 0.7400000095367432 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 105 °C | -40 °C | Isolation Capable, Positive | 0.004394200164824724 m | 0.004399999976158142 m | 20-TSSOP | Enable, On Time Control, Soft Start | 250000 Hz | 8.5 V | 14.5 V | 1 ul | 20-TSSOP | Transistor Driver | ||
Texas Instruments UCC2897PWG4Flyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-TSSOP | 1 ul | 0.7400000095367432 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 105 °C | -40 °C | Isolation Capable, Positive | 0.004394200164824724 m | 0.004399999976158142 m | 20-TSSOP | Enable, On Time Control, Soft Start | 250000 Hz | 8.5 V | 14.5 V | 1 ul | 20-TSSOP | Transistor Driver | ||
Texas Instruments UCC2897APWFlyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-TSSOP | 1 ul | 0.699999988079071 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 125 °C | -40 °C | Isolation Capable, Positive | 0.004394200164824724 m | 0.004399999976158142 m | 20-TSSOP | Current Limit, Enable, Soft Start | 250000 Hz | 8.5 V | 16 V | 1 ul | 20-TSSOP | Transistor Driver | ||
Texas Instruments UCC2897RTJRFlyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-QFN (4x4) | 1 ul | 0.7400000095367432 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 105 °C | -40 °C | Isolation Capable, Positive | 20-WFQFN Exposed Pad | Enable, On Time Control, Soft Start | 250000 Hz | 8.5 V | 14.5 V | 1 ul | 20-QFN (4x4) | Transistor Driver | ||||
Texas Instruments UCC2897ARGPRFlyback, Forward Converter Regulator Positive, Isolation Capable Output Step-Up/Step-Down DC-DC Controller IC 20-QFN (4x4) | 1 ul | 0.699999988079071 ul | Flyback, Forward Converter | Surface Mount | Step-Up/Step-Down | 125 °C | -40 °C | Isolation Capable, Positive | 20-VFQFN Exposed Pad | Current Limit, Enable, Soft Start | 250000 Hz | 8.5 V | 16 V | 1 ul | 20-QFN (4x4) | Transistor Driver |
Key Features
• Low-output jitterSoft-stop shutdown of MAIN and AUX110-V input startup functionIdeal for active-clamp, reset-forward, flyback and synchronous rectifier usesProvides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switchesPeak current-mode control with 0.5-V cycle-by-cycle current limitingTrueDrive™ 2-A Sink, 2-A source outputsTrimmed internal-bandgap reference for accurate line UV and line OV thresholdProgrammable slope compensationHigh-performance 1-MHz synchronizable oscillator with internal timing capacitorPrecise programmable maximum duty cyclePB-free lead finish packageLow-output jitterSoft-stop shutdown of MAIN and AUX110-V input startup functionIdeal for active-clamp, reset-forward, flyback and synchronous rectifier usesProvides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switchesPeak current-mode control with 0.5-V cycle-by-cycle current limitingTrueDrive™ 2-A Sink, 2-A source outputsTrimmed internal-bandgap reference for accurate line UV and line OV thresholdProgrammable slope compensationHigh-performance 1-MHz synchronizable oscillator with internal timing capacitorPrecise programmable maximum duty cyclePB-free lead finish package
Description
AI
The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.
The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.
Features include an internal programmable slope compensation circuit, precise DMAXlimit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.
The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.
The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.
The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.
Features include an internal programmable slope compensation circuit, precise DMAXlimit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.
The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.